SOLUTION: Find the 10th term of a series in Arithmetic series, whose sum to n terms is 3n+4n2(4 n squared)?

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Question 796378: Find the 10th term of a series in Arithmetic series, whose sum to n terms is 3n+4n2(4 n squared)?
Answer by solver91311(24713) About Me  (Show Source):
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The sum of the first 10 terms is

The sum of the first 9 terms is

The difference between the sum of the first 9 terms and the sum of the first 10 terms has to be the value of the 10 term.

John

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